Device for compressing piston rings and cleaning grooves



R. L. PAWSAT Nov. 6, 1934.

DEVICE FOR COMPRESSING PISTON RINGS AND CLEANING GROOVES Filed Sept. 10, 1932 [22:21 for, 4 flUOr Iey Patented Nov. 6, 1934 UNITED STATES PATENT @FFDCE DEVICE FOR COMPRESSING PISTON RINGS AND CLEANING GROOVES of Kentucky Application September 10, 1932, Serial No. 632,564

1 Claim.

My invention relates to a device directed primarily for operating on piston rings and pistons of internal combustion engines and similar devices.

One of the principal objects of my invention is to provide a simple and efi'icient tool for the compression of piston rings within the piston grooves so that the same may be inserted in the motor cylinders.

A further object of my invention is to provide in a tool of the type mentioned means whereby the ring grooves of a piston may be scraped and cleaned. During the operation of internal combustion motors, carbon accumulates on the pistons and especially in the grooves thereof, which must be periodically removed and the pis tons cleaned. My present invention provides a simple, inexpensive and efiicient tool whereby the grooves of a piston may be scraped and entirely freed from carbon and other foreign substances.

Further objects of my invention will appear from the following detailed description thereof:

In the drawing:

Figure 1 is a plan view of my new device.

Figure 2 is a side elevation of the same.

Figure 3 is a detail of one of the scraping tools.

The numerals l and 2 indicate pivotally connected levers of the type generally employed in the construction of pliers, the same being provided with handles 3 and 4 for manipulation. Pivotally connected at 5 at the clamping end of the lever l is one end of an open resilient ring 6; said ring is provided along its upper edge with a series of lugs 7, which are disposed from the free end of the ring approximately a third of the distance around the circumference. Each of the lugs is provided with a perforation 8 which is adapted to receive a stud 9 carried by the clamping end of the lever 2.

Mounted on the lever 2 between its pivotal connection 1 and the stud 9 is a bracket or standard 10 which carries a channeled member 11 within which a plurality of scraping tools 12 may be mounted by means of a screw or similar device 13 which passes through the slots 14 of the scrapers and a perforation in the member 11. The channeled member 11 and lever 2 are located in parallel planes.

One of the scrapers 12 is illustrated in Figure 3, and each consists of a body portion 15 having a slot 14 and sharpened scraping ends or blades 16-16, the latter being of different sizes tofit grooves of different width. As each of the three scrapers is provided with scraping ends that diifer not only between themselves in dimension but also from those of the other scrapers, it will be seen that, as illustrated in the drawing, scrapers are provided of six different dimensions.

From the foregoing description the nature and operation of my device will be apparent to those skilled in the art to which the same appertains.

For compressing the piston rings of a cylinder the ring 6 is placed around the piston ring when the latter is located in the groove, and the stud 9 engaged in the perforation 8 of the appropriate lug 7, reference being had to the size of the piston ring. The levers 1 and 2 are then manipulated in the usual manner, compressing the ring 6 and consequently the piston ring.

When it is desired to scrape the grooves of a piston the ring 6 is placed around the piston, and the appropriate scraping end 16 adjusted in the channeled member 11 so that when the ring 6 is lightly compressed around the piston the scraper Will fit into the groove. Rotation of the device around the piston, or conversely when possible of the piston within the .ring 6, will carry the scraper around the groove effectually removing any carbon or other foreign substance.

While I have illustrated and described my device as provided with a plurality of three doubleended scrapers, it will be apparent that either a greater or less number of such scrapers may be carried directly in the tool or that it may be provided with but a single scraper where desirable. It will also appear that other modifications in the details of construction may be made without departing from the spirit and scope of my invention as defined in the appended claim.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

A device of the character specified comprising a pair of pivotally connected levers, a resilient ring having one of its ends pivotally mounted on the end of one of said levers, a series of perforated lugs on said ring, a stud on the other lever for detachably engaging either of said lugs, a channeled member carried by one of said levers intermediate its pivotal connection and said ring, said member and lever being located in parallel planes, a plurality of scrapers carried in said member, and means whereby any one of said scrapers may be adjusted to extend inwardly of said ring.

RUBEN L. PAWSAT. 

